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Fluids soluble and insoluble in water

Fluids soluble and insoluble in water

A350/0107

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Credit

CHARLES D. WINTERS / SCIENCE PHOTO LIBRARY CHARLES D. WINTERS / SCIENCE PHOTO LIBRARY

Caption

Solubility of fluids. Antifreeze (at right) and oil (at left) being poured into separate beakers of water. The antifreeze is soluble in water and has mixed thoroughly throughout the beaker. The oil is insoluble in water and is settling as a layer on top of the liquid. Water is comprised of highly polarised molecules and will tend to dissolve only those molecules which are also polarised. Oil is made up of molecules which are non-polarised or only weakly- polarised; the oil forms a layer on top because it is lighter. Antifreeze, commonly made of ethylene glycol (1, 2- dihydroxyethane) has polarised components to parts of its constituent molecules, & so will dissolve.

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